At 7.30 o'clock tomorrow, the Union will show on the screen of the Living Room the second of its series of slow-motion pictures on athletics. Tomorrow's pictures will have to do with tennis, and it is expected that the exhibit will prove as popular as the first series, in which football slow-motion pictures were shown. Nearly 200 persons were turned away on that occasion for lack of space.

The films for this exhibit have been obtained by the management of the Union by the special arrangement with the United States Lawn Tennis Association. They include action pictures of Miss Helen Wills, Tilden, Johnston, Richards, and R. N. Williams 2nd '16.

Coach Harry Cowles of the University tennis team will be on the platform to explain the strokes of the stars.

Coach Cowles when asked whether he thought that such pictures were of value, told the CRIMSON reporter: "I advise all tennis enthusiasts to be present. The pictures have a distinct educative value, and are interesting as they allow the spectator to see whether the champions whose play seems so perfect during match play, have any defects when subjected to the test of slow-motion pictures."